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Spray heads. Either the Hunter Pro Spray series or the Rain Bird 1800 series. Your spacing will vary depending upon your available pressure and the nozzles used. Generally, you can get 10' 12' or 15' nozzles as the most common types. You want to have head to head coverage, meaning each head sprays to the next and so on..

It is possible your valve is stuck open. Remove the top of the valve, and remove the diaphragm and visually check to see if you can see anything in the valve. If the diaphragm looks bad, it may need to be replaced. You can get a rebuild kit for your valves at any local irrigation distributor.

Installed them yesterday. The head pops up like any other rotor. It may be defective. I would first flush out your lines to make sure there is nothing in the pipe, then I would take it back if it still doesn't work. Sounds like everything else you did installing it was right.

You might try a local irrigation distributor or online search. If you can't find a replacement transformer, order a professional grade controller from Sprinkler Warehouse. I wouldn't even mess around with the home improvement store controllers.

Check your start times, and station run times. Sounds like you may have different start times or multiple programs running. Check if you have more than 1 program, such as A, B, or C. Check to make sure you only have one start time.

Did the existing sprinkler head pop up without trouble? Did you flush the lines out before installing the new head? It could be something got into the pipe. If none of the heads are popping up, it could be a pressure issue or a possible leak.

I am going to have to say that Rainbird is always a good choice for lake systems. The Rainbird valves tend to fair better with dirty water applications, as well as their rotor heads. As far as pumps, I agree with Wetboots, I like the Goulds pump.

Most of the large companies offer some type of training for their products. I am a Hunter Preferred Contractor, and I attend training seminars with them annually. I know Toro and Rainbird do something similar. As for the trade shows, not too sure in Canada, your best bet it to talk to a local irrigation distributor, or check online.

It really all depends on the quality of the irrigation system. A subpar irrigation system will equal a subpar fertilizer application. The fertigator is designed to deliver small precise amounts each time you water, instead of one large dose. Go to the following link for more information: http://www.sprinklerwarehouse.com/fertilizer_system_main.shtml

Go here, and under the Controllers section, click on the ICC, there is your owners manual http://www.hunterindustries.com/Resources/PDFs/pdf_english_manual.html That being said, I make sure the water main is on to your sprinkler system, and make sure if you have a backflow device, those valves are open as well. With water flowing, if the system still doesn't operate, I would probably consider calling in a contractor to further diagnose the system.

Yes, it is alright to post your qoutes, minus the contractors names. We will be more than happy to help steer you in the right direction. As far as brands go, every contractor has their own opinion, but anything of professional grade is a good start.